Sto ve-kadiatob



UNITED STATES PATENT OFFICE.

C. P. CROSSMAN AND J. B. BROVN, OF VARREN, MASSACHSETTS.

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Speccaton of Letters Patent No. 30,301, dated October 9, 1860.

To all whom it may concern:

Be it known that we, C. P. CRossMAN and J. B. BRowN, of YVarren, in the county ot' Wvorcester and State of Massachusetts, have invented a new and improved Heat-Radiating Attachment for Stoves; and we do here by declare that the following is a full, clear, and exact description ot the same, reference being had to the annexed drawing, making a part of this specification, said drawing being a side sect-ional view of our invention.

The object of this invention is to obtain a portable and simple device that may be readily applied to ordinary stoves and which will serve to retain the heat that usually passes up the flue, and render the same available for cooking purposes, or for direct radiation.

To enable those skilled in the art to fully.

understand and construct our invention we will proceed to describe it.

A represents a case or box which may be of any convenient size and of cylindrical, conical or other suitable form. This case or box may be constructed of sheet or cast metal, and within it there is placed a chamber B, of inverted conical form. This chamber B, extends nearly or quite to the bottom of case A, and the bottom of the former is over a pipe or opening C, which forms a communication between the fire chamber of a stove and the interior of case A. The upper end of the chamber B, is in contact with the side of the case A, and cuts olir1 any communication between the space above the chamber and that below it, as clearly shown in the drawings. The chamber B, is provided with a top plate a, which is perforated to form a communication between the upper part of the case A, and the interior of the chamber B, which is filled or nearly filled with pieces of soap stone B, or other poor conductor of heat.

D is a pipe which communicates with the lower part of the chamber B, and extends down nearly to the floor of the apartment in which the device is placed.

E is a smoke-pipe which communicates with. the case A, just below the top of the chamber B, as clearly shown in the drawing.

The space above the chamber B, forms an oven, and it is provided with a door F, and

with a lid Z1. The top plate a, is also pro.

vided with a lid c, which is perforated.`

The case A, may be fitted on any ordinary stove, the opening C, being over the lire chamber thereof.

The operation is as tollows:-The products of combustion pass from the stove through the case A, and into the pipe E, the chamber B, being encompassed by the same, and its contents heated, the latter absorbing and retaining the heat so that the products of combustion will pass through pipe E, into the flue or chimney in a comparatively cool state. When the case A, is applied to a stove the former becomes its flue, the damper of the Hue proper being closed. This is necessary in order to have all the products of combustion pass through the case A. Through the chamber B, a current of air passes, the air being admit-ted into the lower part ot the chamber through the pipe D, from the lower part of the apartment. This air, the coldest in the apartment, in ascending through the fragments of soapstone, becomes thoroughly heated and passes into the oven, and heats the same, the heated air being deprived of all deleterious gases in passing through the interstices of the fragments of soapstone, and causing articles in the oven to be baked rapidly and without injuring the flavor they naturally possess. In case the oven is not required for legiti mate use its lid Z), may be removed, and heated air allowed to escape into the apartment.

The conical form of the chamber B, is essential in order that the heat may act eitectually on it, as the products of combustion pass through the case, said form allowing a proper space between the case and the chamber.

It' desired the oven may be lined with soapstone or fire-brick, and also the case A.

By this invention a large proportion of heat which now escapes into tlues may be made available for heating and cooking purposes, and with but a trilling expense.

IVe do not claim broadly the employment of a soapstone filling as a medium for absorbing heat; but,

Having described our invention, we claim as new and desire to secure by Letters pipe E, oven above the chamber B, With openings b, F, the Whole being constructed as herein set forth and described so as to be capable of application to the top plates of 10 common cooking and other stoves all as setv forth.

C. P. CROSSMAN. J. B. BROWN.

Witnesses:

WM. H. BROWN, LEVI MoURY. 

